NEN EN 50353 : 2001
Current
The latest, up-to-date edition.
INSULATING OIL - DETERMINATION OF FIBRE CONTAMINATION BY THE COUNTING METHOD USING A MICROSCOPE
12-01-2013
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Apparatus
7 Cleaning procedure
8 Sampling
9 Filtration procedure
10 Microscope calibration
11 Fibre counting and expression of results
12 Calculation and expression of results
13 Precision
14 Test report
Figure 1 - Schematic representation of a suitable
filtration apparatus
Annex A (normative) - Method for low fibre concentrations
A.1 Reagents
A.2 Apparatus
A.3 Initial set-up and cleaning
A.4 Sampling, and filtration of oil sample
A.5 Blank tests
A.6 Counting method
A.7 Calculation and expression of results
A.8 Precision
A.9 Test report
Figure A.1 - Schematic representation of a suitable
filtration apparatus for low fibre
concentrations
Describes two methods for determining the fibre contamination of mineral insulating oil used in electrotechnical equipment, based on filtering a sample of oil and examining and counting the number of fibres on the surface of the filter using an optical microscope.
| DocumentType |
Standard
|
| PublisherName |
Netherlands Standards
|
| Status |
Current
|
| Standards | Relationship |
| I.S. EN 50353:2001 | Identical |
| DIN EN 50353 : 2002 | Identical |
| SN EN 50353 : 2001 | Identical |
| EN 50353:2001 | Identical |
| NF EN 50353 : 2003 | Identical |
| BS EN 50353:2001 | Identical |
| UNE-EN 50353:2002 | Identical |
| NBN EN 50353 : 2001 | Identical |
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